fix refs

docs/modules/core/nav.adoc

@@ -0,0 +1,17 @@
+* Core Engine
+** xref:app/simpleapplication.adoc[SimpleApplication]
+** xref:system/appsettings.adoc[AppSettings]
+** Controlling Game Logic
+*** xref:app/update_loop.adoc[Update Loop]
+*** xref:app/state/application_states.adoc[Application States]
+*** xref:scene/control/custom_controls.adoc[Custom Controls]
+**** Video
+***** link:https://www.youtube.com/watch?v=MNDiZ9YHIpM[Control any scene node]
+***** link:https://www.youtube.com/watch?v=-OzRZscLlHY[Control a character]
+***** link:https://wiki.jmonkeyengine.org/Scenes/SDK-UsecaseDemo_1.zip[Video Source Code]    
+*** xref:multithreading.adoc.adoc[Multithreading]
+** Managing Objects in the Scene Graph
+*** xref:scene/traverse_scenegraph.adoc.adoc[Traverse SceneGraph]
+*** xref:scene/spatial.adoc[Spatial: Node versus Geometry]
+*** xref:scene/mesh.adoc[Mesh]
+*** xref:scene/shape.adoc[Shape]

docs/modules/core/pages/nav.adoc

@@ -1,18 +0,0 @@
-* Core Engine
-** xref:advanced/app/simpleapplication.adoc[SimpleApplication]
-** xref:advanced/system/appsettings.adoc[AppSettings]
-** Controlling Game Logic
-*** xref:advanced/app/update_loop.adoc[Update Loop]
-*** xref:advanced/app/state/application_states.adoc[Application States]
-*** xref:advanced/scene/control/custom_controls.adoc[Custom Controls]
-**** Video
-***** link:https://www.youtube.com/watch?v=MNDiZ9YHIpM[Control any scene node]
-***** link:https://www.youtube.com/watch?v=-OzRZscLlHY[Control a character]
-***** link:https://wiki.jmonkeyengine.org/Scenes/SDK-UsecaseDemo_1.zip[Video Source Code]    
-*** xref:advanced/multithreading.adoc.adoc[Multithreading]
-** Managing Objects in the Scene Graph
-*** xref:advanced/scene/traverse_scenegraph.adoc.adoc[Traverse SceneGraph]
-*** xref:advanced/scene/spatial.adoc[Spatial: Node versus Geometry]
-*** xref:advanced/scene/mesh.adoc[Mesh]
-*** <<jme3/advanced/shape#,Shape>>
-***